Radeon HD 6790 vs Radeon RX 590

Intro

Compare all of that to the Radeon RX 590, which comes with GPU core speed of 1469 MHz, and 8192 MB of GDDR5 memory set to run at 2000 MHz through a 256-bit bus. It also is comprised of 2304 Stream Processors, 144 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6790		150 Watts
Radeon RX 590		175 Watts
	Difference: 25 Watts (17%)

Memory Bandwidth

The Radeon RX 590 should in theory be quite a bit faster than the Radeon HD 6790 in general. (explain)

Radeon RX 590		262144 MB/sec
Radeon HD 6790		134400 MB/sec
	Difference: 127744 (95%)

Texel Rate

The Radeon RX 590 should be quite a bit (approximately 530%) faster with regards to AF than the Radeon HD 6790. (explain)

Radeon RX 590		211536 Mtexels/sec
Radeon HD 6790		33600 Mtexels/sec
	Difference: 177936 (530%)

Pixel Rate

The Radeon RX 590 should be a lot (approximately 250%) more effective at FSAA than the Radeon HD 6790, and capable of handling higher screen resolutions while still performing well. (explain)

Radeon RX 590		47008 Mpixels/sec
Radeon HD 6790		13440 Mpixels/sec
	Difference: 33568 (250%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the maximum amount of data (measured in megabytes per second) that can be transferred past the external memory interface in a second. It is worked out by multiplying the interface width by the speed of its memory. If it uses DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total texture units of the card by the core speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.